Title
New results on gauge-invariant TMD PDFs in QCD
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Subject
Physics
Source (journal)
arXiv
Volume/pages
(2008) , p. 1-7
Carrier
E-only publicatie
Target language
English (eng)
Abstract
The renormalization properties of unintegrated (transverse-momentum dependent) parton distribution functions (TMD PDF's) are used for analyzing their completely gauge-invariant definition. To this end, the UV anomalous dimension is calculated at the one-loop order in the light-cone gauge and a consistent treatment of the extra singularities, which produce undesirable contributions in the anomalous dimensions, is given. The generalized definition of a TMD PDF, based on the renormalization procedure for the Wilson exponentials with obstructions, is proposed. The reduction of the re-defined TMD PDF to the integrated PDF's, as well as their probabilistic interpretation, are discussed.
E-info
https://repository.uantwerpen.be/docman/iruaauth/c6e28b/cd178f9d8e7.pdf